Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee3f04a5319154b…

MALICIOUS

PDF

68.8 KB Created: 2020-11-16 17:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aa30f21cfa84c27c8833e6e4804b846f SHA-1: d7809e0d55b36e58d59a05d063964f0a7049abbe SHA-256: 7ee3f04a5319154b1defd3516544b432d7aea925846b9f74127863d9ae3abdfd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafficel.ru/123?utm_term=flipped+wendelin+van+draanen+pdf PDF link annotation
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/3969f5b0f.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/busefuluzu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/liwofexesujelepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80613167-c52b-4301-8981-01588d48995b/32481465444.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/91954247265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa5d71c-64e6-4e56-b019-f393dd624403/faxuxafunofokunoledutib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7165b75b-c04f-4b9a-a720-f8f3af7e1e6b/zuxizamowumakanujeta.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/rusewo.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/hyrule_warriors_weapons_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/rubbing_alcohol_boiling_point_celsius.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/10717857282.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 4964 bytes
SHA-256: e5b84496e683b32c16b7567ed56c63e47c2a9ba57168611adff536cd01abe7f8
font_01_sfnt_off0000e143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 11128 bytes
SHA-256: 52c7d31658f61352504fd01164cd19a98534b2f50d66ce4446adc580ec593141

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